Uncoupled dual-mechanism system for seismic resilience: Parametric analyses and preliminary design procedure
Bibliographic record
Abstract
,Achieving enhanced seismic resilience in modern high-rise buildings requires advanced structural systems capable of controlling damage from both first-mode and higher-mode responses. This study develops a preliminary design procedure for a novel dual-mechanism system that allows the uncoupling of overturning and lateral responses at the base of high-rise buildings. The system combines both rocking and shear mechanisms to mitigate higher-mode effects. By developing the design procedure, the study aims to facilitate the broader adoption of the system to improve the seismic resilience of high-rise buildings. To support the development of this procedure, a simplified numerical model was created to represent the seismic behaviour of the uncoupled dual-mechanism system. After establishing the ranges of key design parameters governing the system's strength and component dimensions, a series of parametric studies were conducted using nonlinear response history analyses for two seismic locations: Los Angeles in the United States and Vancouver in Canada. Seismic performance spectra were generated based on these analyses to guide the development of a preliminary design procedure for practical engineering applications. The parametric study established that for buildings up to approximately 300 m in height, a practical range of geometric and strength parameters exists to successfully limit maximum inter-story drift ratios to 1.5%, while controlling base displacements to a feasible 800 mm. Beyond this height, it was found that the required dimensions of the rocking mechanism components become impractically large for constructability and cost-effectiveness, defining the system's effective application limit.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".